I'm now convinced that his corrupted versions desire is just his deepest unfiltered desires materializing
Exactly!!
Yeah, his talk about obsession becoming stronger made me have a suspicion that maybe before he fell into the abyss, he always had to hold something back, be it his wishes or desires and wore a mask since everyone saw him as some sort of a hero. So, his corrupted self being a version of him without restraint is kinda endearing to be honest
He also implied that his age was faked so everything about him the media I believe is mostly him wearing a mask
I don't think he was faking his age. It's probably that the time in the abyss flows differently than in the human realm, so I'm guessing he meant three months in the human realm is equal to thirty years in the abyss
If his corrupted Hyunmook likes Yohan so bad, doesn't that mean his real self feels about the same? Just less honest about it. And maybe his trait that the corruption makes stronger is something like 'let loose' or 'act as desired'